One of the best ways Pokemon GO players can earn XP and unlock rewards in the game is by completing Field Research tasks. Pokemon GO Field Research tasks are primarily obtained by spinning PokeStops, giving players objectives to complete in exchange for various rewards. Pokemon GO players earn a stamp for each day that they manage to complete a Field Research task, culminating in a Field Research breakthrough after seven stamps have been collected.
Pokemon GO tends to cycle in a new Field
Read more on gamerant.com